A method for removing cyanide in cyanide-containing wastewater by using ionic liquid supported liquid membrane technology, using membrane hydrophobic polyvinylidene fluoride microporous filter membrane as porous carrier, and using 1-butyl-3-methylimidazole hexafluorophosphate It is an ionic liquid, and the porous carrier membrane is immersed in the ionic liquid by an impregnation method. Due to the effect of surface tension, the ionic liquid fills the membrane pores of the carrier membrane to form an ionic liquid supporting liquid film; the supporting liquid film is fixed in the feed liquid phase (cyanide) In the middle of the liquid waste water) and the analysis phase (sodium hydroxide solution), stirring and mass transfer are carried out on both sides of the liquid film, and finally enrichment and recovery of cyanide in the analysis solution; the present invention imitates the characteristics of active transport of biofilm, and has good selectivity, High separation efficiency, large enrichment multiple, low energy consumption, easy operation, short treatment cycle, cyanide can be recycled, easy for engineering application, and the advantages of reusable membrane phase, the removal rate can reach more than 95%, It can realize efficient treatment of cyanide and resource recovery.